Accused brother-killer Jonathan Dick may have been hiding in plain sight in Melbourne's inner-north, according to Victoria's top cop.

Chief Commissioner Graham Ashton said it was possible the murder accused hid in plain sight in Fitzroy's homeless community and survived off food from community gardens and supplies from homeless agencies including in the CBD.

"We are still piecing together his movements but for a little period of time it appears he was living in the Fitzroy area in a homeless capacity, and in that time period we also had him in the country and Mornington Peninsula areas, where he was getting food from community gardens," he told 3AW.

Mr Cammarata had been living in fear since the alleged hammer ambush by Dick on August 23 last year.

9News has obtained footage of the alleged attack, which appears to show Dick lying in wait before lunging at Mr Cammarata with the weapon.

Dick briefly faced Melbourne's Magistrates Court last night charged with one count of murder for allegedly killing his brother David with a sword at Westfield Doncaster shopping centre in February 2017.

Last year a $100,000 reward was issued for information leading to Dick's arrest over his brother's murder and the attack on Mr Cammarata.

Chief Commissioner Graham Ashton commended Mr Cammarata and Mr Raiola yesterday and said they may be considered for the reward.